Ok guys, newbie to the thread and to Heartland. We just picked up a used 2015 Cyclone 3418 and I have a question about the anderson 4 way valve system it comes with. My last trailer was very simple and straight forward, it was gravity fed into the tank with a vent valve right next to it and the water would spill out the vent when full. With this new rig, I was going through everything last weekend trying to figure everything out and making sure everything worked. I filled it up with water by switching to tank to fill and was expecting something to spill out somewhere to know when it's full but nothing happened. I had the hose connected for almost 30 minutes and the panel indicated the tank was full. I took the storage area apart so I could see the back of the valve and see how it is connected and there is a hose going to the open hole in the middle of the 4 way valve which I assume is the vent. Shouldn't water come out of the vent when it's full? Or do these systems have some sort of shut of valve for over fill protection? I've looked around on forums and did some searches but didn't find any definitive answers. Any help would be appreciated. Thanks in advance.